Fuel-heatek



G. 0. OLSEN.

FUEL HEATER.

APPLIcmoN msn sEP1.13. 1915.

Patented May 27, 1919.

UNlTED STATES PATENT OFFICE.

GEORGE o. oLsnnor n'osroN, M ssiioinrsnr'rs, A'ssIGNoa rro Nrrnb STATES vAronIzER oo., A C! remmen or MASSACHUSETTS.

FUEL-HEATEB.

Speclcti'n of Letters Patent.

Patented May 27, 1919.

To all whom may como/'n Be it known that I, Geenen O. OLSEN, a citizen of the United States, residing at Mattapan, Boston, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Fuel- Heaters, of which the following is a specication.

This invention relates to improvements in charge forming devices for internal combustion engines and has for its object to provide a simple, highly eflicient device for licatin the fuel and air prior to the mixture thereof and to subsequently heat the charge produced bythe mixing of said air and gas.

The invention consists in the combination and arrangement of parts set forth in the following specification and particularly pointed Vout in the claims.

Referring to the drawings:

Figure 1 is a side elevation of a device embodying my invention.

Fig. 2 is a longitudinal section through said device.

Fig. 3 is atransverse section taken on the. lineMS- of F l.

Like numerals refer to like parts throughout the several views of the drawings.

` Iii the drawings, 5 is a casing preferably substantially cylindrical in form having closed ends 6, 6, said ends being preferably provided with openings 7 and 8. A conductor 9 for the vaporwhich is to be conducted to the internal combustion enginenot shown in the drawings, is arranged withinkthe casing 5, said conductor preferably consisting of apipe having screw threaded portions 10 and 10 at opposite ends respectively thereof, the screw threads of `which engage corresponding threads formed in the openings 7 and 8 of said Qangthus closing said openings and providing a chamber 11 between said conductory and the walls of said casing. Y.

To facilitate the assembling of the casin 5 with the conductor 9 Within, said casing is formed in two parts 12 and 13, separated transversely of said casing at '14, each of said parts having an annular flange 15 formed thereon, adapted to engage the iange of the other part and these anges are secured together preferably by means of screws 16 16.

The chamber 11 of said casing 5 is supplied with a heating medium preferably through an inlet opening 17 arrangedniprefcrably in the side of said casingy adjacent to the ond of the casing having the opening 8 which is at the discharge endv of the oonductor 9. The inlet opening 17 is preferably connected with the discharge or exhaust pipe 18 of the internal combustion engine to which this device is to be attached, thus conducting the discharge gases from said engine into said chamber 11 in Contact with the conductor 9, whereupon the gas or vapor passin through said conductor will he heated beore it is taken into the cylinders of the engine.

An exhaust outlet opening 19 is provided in the casing 5 adjacent to the opposite end thereof from that at which said opening 17 is located, thus permitting the discharge gases to travel entirely through said casing before it is permitted to discharge therefrom. A portion ofthecylindrical wall of the casing 5 preferably at the middle thereof is greatly decreased in thickness as at 20, said reduced portion being formed so as to provide a helical groove 21 having a plurality of convolutions encircling the chamber 11.

Within said groove is placed a pipe 22 which constitutes the fuel pipe, said fuel pipe being coiled tightly against the inner portions of the groove 21 so as to Contact with the inner wall of said casing and thus facilitate the radiation of heat from the in terior of said ea-sgingto the interior of said fuel pipe. The end 23 of said pipe extends to a suitable fuel supply reservoir, while the opposite end 24 extendsfto the fuel inlet opening of a carburetor 25y whichis attached tothepoonductor 9 adjacent to theopening 7 of thecasing 5. ,Y

A tlln covering or casing 26 is arranged about the casing 5 over-the thin walled portion containing the fuel pi e 21 so as to cornpletely inclose the coile portion of said pipe, a slight space 27 being provided between said pipe 21 and said casing so as to provide an air space 27 entirely surrounding said casing. At one side of the casing 26 a plurality of perforations 28, 28 have been rovided through which air may be drawn rom the atmosphere into the space 27 and a discharge opening 29 provided in the opposite side of said casing 26 from the perforations 28 and said discharge opening is connected by a pipe 3() to thiA air intake 31 of the carbureter 25.

Auxiliary air portsl may be provided in the pipe 30 at 32 so as to admit atmospheric air directly to the carbureter. To control the amount of air passing through the ports a shutter 33 may be provided which is ro tatably mounted upon the pipe 30, said shut ter having openings 34 which correspond in size with the openings in the pipe and may be moved by rotating said shutter to admit air or to prevent the admission of air to the pipe 30.

By reason of the construction set forth the fuel which is to be supplied to the iuternal combustion engine may be carried through the coils of the pipe 21 and heated before it is admitted to the carbureter 25, thus eatly facilitating the vaporization of said el. Furthermore, the airl which is to be mixed with the fuel so as to increase the efiiciency o'l' the charge will be headed as it i= passed in contact With the heated sin-fare of the pipe 2l and the Walls 2O within the chamber 2T before it is conducted to the carbureter.

After said air and gas have been properly mixed and said mixture is ready to be con ducted to the cylinders of the engine it passes through the conductor 9, which may be designated the central chamber of the casing 5, Where it will be heated by the exhaust gases passing through the chamber 11 from said engine, said chamber 11 constituting a second chamber and surrounding said central chamber, thus said mixture Will be maintained in its fully expanded condition until it is delivered to the engine. The space 27 containing the coils of the fuel pipe, as hereinbefore stated, entirely surrounds the second chamber 11, thus making three sep*- arate and distinct compartments, each adapted to contain different forms of iinids or gases.

Having thus described my invention. what I claim and desire by Letters Patent to se cure is:

l. A device of the class described having, in combination, a vapor conductor, a casing surrounding said conductor, an exhaust pipe connected with and adapted to conduct eX haust gases to said casing, a fuel pipe encircling said casing outside of the passage 'or said exhaust gases, means `for inclosing said fue] pipe, and means for con ducting air to said fuel pipe inclosiug means, whereby said air may be heated.

2. A device of the class described having, in combination, a casing provided with a chamber adapted to be connected with the intake pipe of an internal combustion engine, a second chamber surrounding said irst named chamber, means adalitnd to connect said second named chamber with the exhaust pipe of an internal combustion en gine, a third chamber encircline` said second named chamber, means for conveying fuel through said third named chamber, a carbureter, means for conducting fuel through said third named chamber to said carbu reter, and means for conducting air through said third named chamber, independently of said fuel heating means, to said carbureter.

3. A device of the class described having` in combination, a casing provided with openings at opposite ends thereof, a straight tube extending the length of said casing through said openings and having screw threaded engagement with said casing at said openings, means for condiu-ting a heating medium through said casing, a fuel pipe arranged exteriorly of the outer wall of said casing, and means for inclosing said fuel pipe and constituting an air chamber.

4. In combination a carbureter, a vapor conductor connecting said carbureter with the intake of an internal combustion engine, a casing surrounding a portion of said conductor, means for conducting exhaust gases from said internal combustion engine to said casing to heat the vapor passing through said conductor, a fuel conductor disposed adjacent to the outside of said casing, adapted to supply fuel to said carbu reter, a second casing surrounding the first named casing, and means for connecting said second named casing with the air inlet of said carbureter, adapted to supply heated air to said carbureter.

In testimony whereof I have hereunto Set my hand in presence of a subscribing Witness.

GEORGE OLSEN. Witness:

CHARLES S. GOODING.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner uf Patents, Washington, D. C." 

